Hello, I am stubborn. Desperate to make large pages work. The procedure is not complicated.Making it work is for me, has been a nightmare. So I have started a new thread consolidated various responses. First I copy and paste my stuff. I have tried, many different names, including, everyone, administrator, WAYNE-PC, Wayne Lowrance, etc.I have tried all powers of 2 hash sized 64-2048 meg. I have tried all the reported verification post for howto tell if it is working. It IS not. I do not think it is a memory frag problem. The telling report from the engine CreateFileMapping should tell me the problem.I have wasted a lot of forum bandwidth on this issue, I am sorry. I will stop soon, one way or the other.

BTW there has been enable/disable HT threads here.. All say, Rybka runs best with it off.Problem is It is not available to toggle off in a MacPro, always enabled. Just mentioning this asmaybe It affects Large Pages.Let' see, what else, i guess that is about it.Thanks all for working with meWayne

I did the procedure by scratch. inserted "everyone"when I started Rybka I watched for about 30 seconds, nothing happened, except i got feedback fromengine that I had enabled long pages. This has always been the case but never waited long enough to getthe engine replay "using large page= 2,150,000.000, children restarted". This last time,I left computer room to go assist my wifewith bringing in the groceries. When I returned i saw that it was working :)You know, the very first time I did this several days ago with "everyone" named. I was just impatient. Should have waited for a minute or so cause it was probably working. My grateful thanks to all who have been patient with me.Wayne